https://community.netapp.com/t5/ONTAP-Discussions/7MTT-Error-40121/m-p/135379#M29725 <P>Hello - did you already have 3 different domains configured on the C-mode SVM? Looks like C-mode now has a best practice to configure one domain per SVM and hence failing transition. The command you’ve listed will ignore if there is a CIFS Domain mismatch between 7-mode and C-mode and by ignoring it you are accepting they are trusted domains.&nbsp;</P> Wed, 18 Oct 2017 14:29:17 GMT MAHESH1111111 2017-10-18T14:29:17Z https://community.netapp.com/t5/ONTAP-Discussions/7MTT-Error-40121/m-p/135344#M29715 <P>I am getting blocking error (40121) in the 7MTT:</P><P>&nbsp;</P><P>"The total combined number of DNS name servers on the specified 7-Mode storage systems and the SVMs is more than 3. Clustered Data ONTAP supports only 3 DNS name servers"</P><P>&nbsp;</P><P>The KB in the recommened actions shows nothing (<A href="https://kb.netapp.com/support/index?page=content&amp;id=8010446" target="_blank">https://kb.netapp.com/support/index?page=content&amp;id=8010446</A>).</P><P>&nbsp;</P><P>What is the workaround for this issue?</P><P>&nbsp;</P><P>I've tried running the following command, to no avail:</P><P>&nbsp;</P><P>transition cbt ignoragbleerrors add -p "project" -c ignore-cifs-ad-domain-mismatch</P> Wed, 04 Jun 2025 14:28:37 GMT https://community.netapp.com/t5/ONTAP-Discussions/7MTT-Error-40121/m-p/135344#M29715 erbeard_michelin 2025-06-04T14:28:37Z https://community.netapp.com/t5/ONTAP-Discussions/7MTT-Error-40121/m-p/135379#M29725 <P>Hello - did you already have 3 different domains configured on the C-mode SVM? Looks like C-mode now has a best practice to configure one domain per SVM and hence failing transition. The command you’ve listed will ignore if there is a CIFS Domain mismatch between 7-mode and C-mode and by ignoring it you are accepting they are trusted domains.&nbsp;</P> Wed, 18 Oct 2017 14:29:17 GMT https://community.netapp.com/t5/ONTAP-Discussions/7MTT-Error-40121/m-p/135379#M29725 MAHESH1111111 2017-10-18T14:29:17Z